Blender motion blur too long
Use a smaller shutter value. 



A smaller number would give you less blur, freezing the action. Same effect as a faster shutter speed on a real camera, where the film or sensor is exposed less time to the light.

A larger value would result in more blur, the same way as using a longer exposure time on a real camera.

If you are curious of where the default value of 0.5 comes from, you can read https://en.wikipedia.org/wiki/Rotary_disc_shutter. Motion picture cameras have a rotating shutter in the form of a semi-circle, half the time the film is held in place while is being exposed to the light, the other half of the time the shutter is closed while the film transport mechanism moves the film for the next frame to be exposed.